's speech to the united nations general assembly... at half past midnight thursday, korea time,... 3:30 p.m. wednesday, gmt and 11:30 a.m. eastern. the two koreas' efforts in beijing to create an agreeable atmosphere... to reopen the six-party nuclear talks have failed. the top negotiators, however, said they saw the discussions as positive. arirang's choi you-sun has the details. the two koreas, yet again, were unsuccessful to agree on the resumption of the six-party talks to denuclearize north korea. but the chief negotiators from both sides have called wednesday's talks in beijing "constructive" and "useful," in resolving the north's nuclear issue through the multilateral dialogue, involving the two koreas, the us, china, russia and japan. following the meeting held in bali two months ago, south korea's top nuclear envoy wi sung -lac and his north korean counterpart ri yong-ho held two rounds of discussions in beijing, where wi laid out a set of pre-dialogue conditions, endorsed by the south, the us and japan. the trilateral demands include the north halting its uranium enrichment prog